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Hydrogenolysis is a catalytic chemical reaction whereby a molecule of hydrogen is added over a carbon-heteroatom single bond, effectively causing a "lysis" of the bond. The heteroatom may vary, but usually is oxygen, nitrogen or sulfur. A closely related reaction is hydrogenation, where hydrogen is added over a carbon-carbon double bond (leading to the ultimate reduction to a single bond).
Additional recommended knowledge
With the current knowledge, the only definitive statement that can be made about the ease of hydrogenolysis is that presence of a positive charge (formal or partial) on the heteroatom greatly increases the rate of hydrogenolysis.
The term was coined by Homer Burton Adkins.
Use in industry
The catalytic hydrogenation of organic sulfur compounds to form gaseous hydrogen sulfide (H2S) is very widely used in petroleum refineries, petrochemical plants and other industries to desulfurize various final products, intermediate products and process feedstocks by converting sulfur compounds to gaseous hydrogen sulfide which is then easily removed by distillation. The gaseous hydrogen sulfide is subsequently recovered in an amine treater and finally converted to elemental sulfur in a Claus process unit. In those industries, desulfurization process units are often referred to as hydrodesulfurizers (HDS) or hydrotreaters (HDT). In the petroleum refining and petrochemical industries, cobalt-molybdenum or nickel-molybdenum catalysts are commonly used for hydrogenation and hydrogenolysis catalysts.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Hydrogenolysis". A list of authors is available in Wikipedia.|